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pinctrl: mediatek: add EINT support to virtual GPIOs 

Virtual gpio only used inside SOC and not being exported to outside SOC.
Some modules use virtual gpio as eint and doesn't need SMT.
So this patch add EINT support to virtual GPIOs.

Signed-off-by: Chuanjia Liu <Chuanjia.Liu@mediatek.com>
Acked-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
chuanjia.liu 2019-01-03 11:37:15 +08:00 committed by Linus Walleij
parent 3fbb9a8d79
commit 6e737a4e92
1 changed files with 7 additions and 1 deletions
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8
drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
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@ -290,7 +290,13 @@ static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, MTK_ENABLE);
if (err)
/* SMT is supposed to be supported by every real GPIO and doesn't
* support virtual GPIOs, so the extra condition err != -ENOTSUPP
* is just for adding EINT support to these virtual GPIOs. It should
* add an extra flag in the pin descriptor when more pins with
* distinctive characteristic come out.
*/
if (err && err != -ENOTSUPP)
return err;
return 0;